Switching device.



D.v D. GORDON. SWITCHING DEVICE. VAPPLICATION man onze. umA

Patented May 23, 1916.

2 SHEETS-SHEETI Patented May ,1916, 2 SHEETS-SHEET 2.

www@ A A F` f J L v wfg@ havin I). GORDON, 011 CHICAGO, ILLINOIS, ASSIGNOR TO II-IE YOST ELECTRIC MANU- FACTUBING'COIVIPANY, OF TOLEDO, OHIO, CORPORATION OF OHIO.

swrrcnrna niavrcii.

Specification of Letters Patent.

Patenten nay sa. raie. 4

Application filed October 26, 1914. Serial No. 868,648.

To all whom t may concer/n Be it known that I, DAVID D. GORDON, a citizen of the United States, residing at Chicago, in the county of Cook and State ot' Illinois, have invented a` certain new and useful Improvement in Switching Devices, of which the 1following isha full, clear, concise, andexact description, reference being had to the accompanying drawings, forming a part of this specification.

My invent-ion relates toswitching devices and has for its object the provision of a switch element alternately operable from a circuit closing to a circuit opening position which is controlled by a single actuation thereof. In accordance my improved devicev may be ot particular beneit in connection with pull sockets where a single actuating member is employed ormay be usedin other switching devices `where a single member, for instance a reciprocating member, may be used alternately tol effect circuit closure or circuit opening.

More particularly my invention is an improvement over-the device set forth in my coepending application Serial No. 818,287, tiled Feb. 12, 1914.

In one of' the preferred forms of 'my-invention, I utilize a pawl and ratchet mechaiiism of such a character that the ratchet may carry the contact element and this ratchet is moved throughout a part of its movement by a pawl under the actuation of a control member, the remaining movement of the ratchet being automatic to complete a snap y action circuit rupture or circuit closure.

I will describe this preferred form with.

various modications in the accompanying drawings, in which- Figure 1 is a lside view partly in section of my improved switch mechanism; Fig. 2 is a view' on line n n of Fig. 1; Fig. 3 is a view similar to Fig. 2 showing the parts'in an `alternative position; Fig. 4 is a view similar to Fig. 1 but at right angles thereto; Fig. 5 is a plan view partly in section of a modiied Fig. G is a view on line b-b of Fig. 5; Fig. 7 is a plan view partly in section of a further modification, and Fig. 8 is a viewon lines cc of Fig. 7.

My improved structure as illustrated more particularly in Figs. 1, 2, 3 and 4 comprises a socket having a supporting element 1 of insulating material within which all of the apparatus is mounted. One lead in wire l2 has its circuit carried downwardly .by aconducting bolt 3 directly to the central contact '1- ot the socket and the other lead in wire has the continuance of its-circuit toward the outer contact 6 of the socket controlledby the switching device which forms the sublect matter of my invention. This switching device is adapted to complete the circuit between a stationary 'switch` .plate 7 and a second stationary switch plate 8, both having yielding extensions such as l9 to effect a more thorough contact. The l,element Sis directly connected with the lconductor 5 and the element 7 is directly connected. with the exterior contact 6. The circuit through these' elements 7 and 8 is completed by a rotatable switch element having the Contact arms 10 and 11 which are electrically ,connected together, and with the metallic'strip 12. rllhe movable switch element consisting of the parts 10, 11 and 12 is pivotally mounted by having extensions 13 and preferably has a coat of insulation 14 about which a metallic ring 15 may preferably be placed to be engaged by an operating pawl 'aswill presently appear', the insulating coat lil serving to insulate the contactdevice 10, 1l Iand 12 from thev operating portion of the switch.

The metallic envelop 15 has a groove 16 whichcooperates with the tree extremity 17 of a coiled springl 1S, which coiled spring is mounted about'a pin 19. An operating ai'in 20 is also pivotally mounted upon the pin 19 and is held in its outermost position shown in Fig. 2 by the opposite free extremity 21l of the spring 1S. lThis pivotally mounted arm 2() consisting preterablyof two parallel legs carry `at its free extremity a pivotally ,y

forms the subject matter ot' my co-pending application Serial No. 81S,238,filed Feb. .12. 1914.- Eacln pull exertedby the operating member 27 (Fig. 2),rotatestheariir .2Q-in a 110 This operating y member passes through an oriice`28and may be suitably actuated b v achain particular curved operating member 27 i clockwise -direction so that the pawl 22 rov cal position vao ' action into its other limiting position.

la, very extended length -35'10 and 1l will not leave the said elements.

tates the ratchet element or moving contact also in a clockwise direction.

It will be seen that the initial pull of the member 27 rotates the pawl 22 itself about its pivotal contact should said pawl be away from the ratchet element and the guardy finger 24 limits this rotationso that the pawl assumes its proper position with the finger. 23 pushing against theadjacent extremity of the ratchet. Assuming now that the pull is being exerted by the operating member 2T to rotate the arm 20, thenthe 4ratchet element is rotated into the dotted position asshowii in Fig. 3 whereupon by a slight further actuation of said operating member the ratchet element passes its 'critiand its further clockwise rotation is completed by the arm 17 of the spring 1S sov that the element finally comes to rest in the position shown in Fig. 3 which is the position alternative to that of Fig. 2f

A second actuation ofA the control member 27 passing through a like sequence of movements again brings the ratchet element to the position of Fig. 2. It will be seen that ay portion of -the movement of'this contact element 10, 11 and. 12 is brought. about by the contiol member 27 and after it has beenmoved beyond its critical position the spring 17 completes the movement by snap It springs 9 have so that the elements will be seen that the contact 9 (when movingthe switch from circuit closure to circuit rupture) until after the ratchet lelement has passed its critical position and is moving by snap action under the influence of the spring 17.

The simplicity of this structure will be readily apparent from'what has been described. There are three rotatable elements and one operating spring and these four elements provide a device operable through the agency of one control member to get both a quick-make andquick break or what might be termed a snap action circuit rupture and snap action circuit closure.

In Figs. 5 and 6, I sow a modified form of structure in which the pawl 22n engages the' ratchet element 12 upon the side nearest I Y to the arm 20. The control element 27a is als e adapted to engage other figures and cooperates with spring fingers 9", 9b. The pawl 32 is'pivotally mounted upon the slide 3() and engages the nearest extremity ot' the ratchet element similar to thestructure shown in the other figures. A single spring 33 has one free extremity 31 engaging the ratchet element and theotherfree extremity 35 engaging a pin 3G which tends to press the pawl 32 against the ratchet element 12b. The spring thus again controls the action of' the pawl against the ratchet element and also simul-4 taneously controls the ratchet element. The contact springs 9b are again made long enough so Ithat no circuit iupture takes place until the snap action movement of the combined contact ratchet element.

From what has been described the nature of my invention will be clear to those skilled in the art, and it will also befclear that modifications may be made without departing from-its spirit, l

Having however thus described various forms of carrying out my invention, what I claim as new and" desire to secure by Letters Patent is:

1. A pull socket movement comprising a, flexible tension member, a pivoted arm movable by said tension member, a stationary switch element, a movable switch element coperating 'therewith, a rotatable plate carrying said movable switch element, a pawl carried by said pivoted arm and said plate, and a spring interposed between said pivoted arm and said plate, said pawl when actuated by the movement of said pivoted arm rotating said plate against the action of said spring to and beyond its position of repose .and said -sirin com Jletinfr the forward movement of said plate to its alternative position.

2. A pull socket movement comprising a flexible tension member, a pivoted arm movable by said tension'inember, a stationary switch element, a movable switch element coperating therewith, a rotatable plate. cairying said movable switch element, a pawl carried by said pivoted arm and adatped to engage said plate, and a compression spring engaging both said pivoted arm and said l plate, tlie'vplate said spring being said plate is in one or the other of its resting .positions and normally holding said plate in said resting position, said pawl when actuated by the movement of said pivengaging an extension of oted arm to rotate said plate against the action of said spring position of repose.

3. A pull socket movement comprising a flexible tension member, a pivoted arm movable by said tension member, a stationary switch element, a movable switch element coperating therewith, a rotatable pla-te carrying said movable switch element,

to and beyond its parallel to-said plate when las mma@

sa. wmess whmaof, 1i hm'eumdsnbscribe my 'mmm us 22nd day of ctober', A. D.,

' DAVID D. GURDON. wimesss:

MAX. Zmm, HAZEL A. JONES. 

